DeepSeek V4 Pro Just Dropped — Here's What Changed for AI Agents

V4 Pro launched April 24, 2026. Been running it on production agents since.

Specs

• Total params: 1.6T (MoE)
• Active params: 49B
• Context: 1M tokens (verified)
• Modes: Think / Non-Think dual
• License: MIT
• Pricing: $1.74/1M input, $3.48/1M output

API Setup (OpenAI-compatible)

client = OpenAI(
    base_url="https://integrate.api.nvidia.com/v1",
    api_key="<NVIDIA_NIM_KEY>"
)
response = client.chat.completions.create(
    model="deepseek-ai/deepseek-v4-pro",
    messages=[...]
)

Real-World Performance

• Long context tasks: Finally viable at scale (full conversation logs)
• Thinking mode: 8-15s, much better multi-step planning vs V3
• Non-thinking mode: ~2s, fast enough for content pipelines
• Function calling: More reliable than V3.2

Cost Comparison (per 1M tokens)

Model	Input	Output
DeepSeek V4 Pro	$1.74	$3.48
Claude Sonnet 4.6	$3.00	$15.00
GPT-4o	$2.50	$10.00

For agent workloads (lots of input, structured output), V4 Pro is the new sweet spot.

My agent automation guides updated for V4: https://yanmiay.gumroad.com